Blood Loss in Total Knee Arthroplasty

Area of Science:

• Orthopedic Surgery
• Surgical Innovation
• Patient Blood Management

Background:

• Total knee arthroplasty (TKA) is associated with significant perioperative blood loss and transfusion risks.
• Optimizing patient blood management is crucial in adult arthroplasty.
• Current evidence is inconclusive regarding surgical techniques for minimizing blood loss in TKA.

Purpose of the Study:

• To compare blood loss and transfusion rates among patient-specific instrumentation (PSI), navigated computer-assisted surgery (CAS), and conventional TKA techniques.
• To evaluate the influence of surgical and patient factors on perioperative blood loss and transfusion requirements.
• To determine if advanced instrumentation techniques reduce blood loss in TKA.

Main Methods:

• Retrospective review of a prospective randomized cohort study.
• Comparison of 128 matched patients (38 PSI, 44 CAS, 46 conventional).
• Analysis of preoperative demographics, hemoglobin levels, and perioperative factors including surgical/tourniquet time and drain output.

Main Results:

• No statistically significant differences in blood loss or transfusion rates were observed between PSI, CAS, and conventional TKA groups.
• Preoperative patient demographics were similar across all three surgical technique groups.
• Maximal hemoglobin drop and transfusion requirements did not differ significantly between the groups.

Conclusions:

• Patient-specific instrumentation (PSI) and computer-assisted surgery (CAS) do not significantly reduce perioperative blood loss compared to conventional total knee arthroplasty.
• The study did not find evidence to support the use of PSI for minimizing blood loss in TKA.
• Further investigation into surgical techniques influencing blood loss in TKA is warranted.